hi, maybe try searching for the password with flashlight? Some clues can only be seen when the flashlight is on
Post the code under a spoiler on the page to save time for the people that can't be bothered to look for it.
Also my two cents on the game design of Summon are that the game feel coupled with the finnicky camera and poor light conditions are what is ultimately the most discouraging thing standing between the player and the code in this case.
(Granted I was playing it sleep deprived, so I had that handicap going for me. Still.)